Equipment-sheet precision entry: 0.001–0.003 mm.
PRODUCT Complex-feature manufacturing
EDM, Electrodes
& Wire EDM.
Electrode machining, spark erosion and wire cutting are coordinated with the same drawing and datum plan used for CNC, grinding and final inspection.
Send an EDM RFQ →
01 Process selection
Use EDM for a reason,
not as a default.
EDM is useful for deep ribs, internal details, hardened steel and features that rotating tools cannot reach. Wire EDM is used for conductive components requiring controlled profiles, slots or through-features.
02 Feature examples
Let the geometry
select the process.
These representative parts show narrow slots, internal profiles and difficult feature access. A photograph does not identify the manufacturing route by itself; CNC, grinding, EDM or wire EDM is selected only after drawing review.
See mold component capability →
Representative geometry only. The photographs do not establish the process used, achieved tolerance or surface finish. Those points are confirmed from the controlled drawing and inspection plan.
03 Equipment & recorded precision
Equipment-sheet precision entry: 0.002–0.005 mm.
Equipment-sheet precision entry: 0.001–0.003 mm.
Equipment-sheet precision entry: 0.001–0.003 mm.
EDM process dataStable tolerance: 0.005 mm · Work size: 500 × 350 × 350 mm · Depth: 200 mm · Minimum gap: 0.002 mm · Minimum internal radius: 0.01 mm · Ra 0.1
Slow-wire EDM process dataStable tolerance: 0.02 mm · Work size: 500 × 350 × 260 mm · Maximum thickness: 260 mm · Minimum wire diameter: 0.1 mm · Taper: 10° · Ra 0.3
Machine counts, models and machine-precision entries follow Huicheng's factory equipment sheet. Stable process figures follow the technical-process sheet. They are different data layers: the quoted part tolerance is confirmed against geometry, material, setup, current machine condition and the agreed inspection method.
04 Electrode workflow
Geometry, spark gap
and inspection stay connected.
The recorded workflow starts with the part requirement and checks the electrode before EDM.
Feature review
Confirm geometry, datum references, access, finish and critical interfaces.
Electrode planning
Select electrode strategy, material, allowance and rough or finish stages.
Electrode machining
Machine the electrode to the controlled program and fixture plan.
Pre-EDM inspection
Check the electrode by CMM or the agreed measurement method before use.
EDM & final check
Run the agreed EDM stages, then inspect the finished feature against the drawing.
05 Process questions
Choose the process
from the feature.
When is EDM preferable to CNC?
EDM is considered when tool access, internal geometry, hardened material or the required corner detail makes conventional cutting impractical.
When is wire EDM the better option?
Wire EDM is suited to conductive parts with through-features, profiles, slots or punches where a controlled wire path can reach the complete geometry.
Are electrodes inspected before EDM?
Huicheng's recorded workflow includes post-machining electrode inspection and a decision to accept, repair or remake before EDM.
What EDM tolerances are recorded?
The factory process sheet records a stable EDM tolerance of 0.005 mm and a stable slow-wire EDM tolerance of 0.02 mm. The equipment sheet separately records machine-precision entries of 0.001–0.003 mm for Makino EDGE3S and the listed slow-wire machines, and 0.002–0.005 mm for Sodick AD32. Machine precision is not the same as a guaranteed part tolerance.
Have a difficult internal feature?
Send the drawing and identify the surfaces, datums and finish that control function.
Request a Process Review →